“Stranger: What do you do for a living?
Me: I am a controls engineering mechanical welder electrical programming purchaser carpenter technician.
Stranger: is there anything you don’t do?!
Me: Toliets.”

__________________
“Did the Lord say that machines outta take the place of livin’, and what’s the substitute for bread and beans? Do engines get rewarded for their steam?” -John Henry

That one is also referred to as "the PICNIC principle"
(Problem In Chair, Not In Computer)

I strive to make my programs idiot proof. But the universe keeps coming up with greater idiots.

Different versions of that concept exist, most would require an XXXL size shirt:

Hitch Hikers Guide To The Galaxy:

A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.

Attributed to Tim Cook:Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning.

“Stranger: What do you do for a living?
Me: I am a controls engineering mechanical welder electrical programming purchaser carpenter technician.
Stranger: is there anything you don’t do?!
Me: Toliets.”

“Stranger: What do you do for a living?
Me: I own an industrial automation company.
Stranger: So what do you do?
Me: I clean toilets.”